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Mathematics 7 Online
OpenStudy (nina21):

Jaoquin buys 3 dozen light bulbs. After changing the light bulbs in his house. he has 15 light bulbs left. How any light bulbs did he use? I don't get it can someone explain this medal

OpenStudy (nina21):

OpenStudy (princeharryyy):

1dozen =12 3dozen = 12*3 =36 not used 15 left 36-x=15 x= 36-15 =21

OpenStudy (princeharryyy):

minus minus becomes plus so 107-(-25) =107+25 =132

OpenStudy (princeharryyy):

x were used bulbs.

OpenStudy (nina21):

thank you

OpenStudy (princeharryyy):

:)

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